diff --git a/lib/hello_world_message.dart b/lib/hello_world_message.dart
index 5d91ff0..aaefba1 100644
--- a/lib/hello_world_message.dart
+++ b/lib/hello_world_message.dart
@@ -1,7 +1,7 @@
 // Copyright 2022-2024 Hellogramming. All rights reserved.
 // Use of this source code is governed by an MIT-style
 // license that can be found in the LICENSE file or at
-// https://hellogramming.com/hello_world_plus/license/.
+// https://hellogramming.com/helloworldplus/license/.
 
 /// A Hello World message in a specific language.
 class HelloWorldMessage {
diff --git a/lib/hello_world_messages.dart b/lib/hello_world_messages.dart
index 0d28c47..035a3b5 100644
--- a/lib/hello_world_messages.dart
+++ b/lib/hello_world_messages.dart
@@ -1,7 +1,7 @@
 // Copyright 2022-2024 Hellogramming. All rights reserved.
 // Use of this source code is governed by an MIT-style
 // license that can be found in the LICENSE file or at
-// https://hellogramming.com/hello_world_plus/license/.
+// https://hellogramming.com/helloworldplus/license/.
 
 import 'hello_world_message.dart';
 
diff --git a/lib/home_screen.dart b/lib/home_screen.dart
index 5804237..c252992 100644
--- a/lib/home_screen.dart
+++ b/lib/home_screen.dart
@@ -1,7 +1,7 @@
 // Copyright 2022-2024 Hellogramming. All rights reserved.
 // Use of this source code is governed by an MIT-style
 // license that can be found in the LICENSE file or at
-// https://hellogramming.com/hello_world_plus/license/.
+// https://hellogramming.com/helloworldplus/license/.
 
 import 'dart:math';
 import 'package:flutter/material.dart';
diff --git a/lib/main.dart b/lib/main.dart
index 5881ce4..3f865da 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -1,7 +1,7 @@
 // Copyright 2022-2024 Hellogramming. All rights reserved.
 // Use of this source code is governed by an MIT-style
 // license that can be found in the LICENSE file or at
-// https://hellogramming.com/hello_world_plus/license/.
+// https://hellogramming.com/helloworldplus/license/.
 
 import 'package:flutter/material.dart';
 
diff --git a/lib/message_list_screen.dart b/lib/message_list_screen.dart
index 07004eb..faab135 100644
--- a/lib/message_list_screen.dart
+++ b/lib/message_list_screen.dart
@@ -1,7 +1,7 @@
 // Copyright 2022-2024 Hellogramming. All rights reserved.
 // Use of this source code is governed by an MIT-style
 // license that can be found in the LICENSE file or at
-// https://hellogramming.com/hello_world_plus/license/.
+// https://hellogramming.com/helloworldplus/license/.
 
 import 'package:flutter/material.dart';
 
diff --git a/lib/strings.dart b/lib/strings.dart
index 41eaa39..ff84823 100644
--- a/lib/strings.dart
+++ b/lib/strings.dart
@@ -1,7 +1,7 @@
 // Copyright 2022-2024 Hellogramming. All rights reserved.
 // Use of this source code is governed by an MIT-style
 // license that can be found in the LICENSE file or at
-// https://hellogramming.com/hello_world_plus/license/.
+// https://hellogramming.com/helloworldplus/license/.
 
 /// Application wide UI string constants.
 library;
diff --git a/lib/urls.dart b/lib/urls.dart
index 607044e..7384575 100644
--- a/lib/urls.dart
+++ b/lib/urls.dart
@@ -1,11 +1,11 @@
 // Copyright 2022-2024 Hellogramming. All rights reserved.
 // Use of this source code is governed by an MIT-style
 // license that can be found in the LICENSE file or at
-// https://hellogramming.com/hello_world_plus/license/.
+// https://hellogramming.com/helloworldplus/license/.
 
 /// URL constants used in the app.
 library;
 
 const String viewSourceUrl = 'https://github.com/Hellogramming/hello_world_plus';
 
-const String aboutUrl = 'https://hellogramming.com/hello_world_plus/';
+const String aboutUrl = 'https://hellogramming.com/helloworldplus/';